EP3202509B1 - Machine for manufacturing continuous bars of nonferrous metal by continuous casting - Google Patents
Machine for manufacturing continuous bars of nonferrous metal by continuous casting Download PDFInfo
- Publication number
- EP3202509B1 EP3202509B1 EP17154981.9A EP17154981A EP3202509B1 EP 3202509 B1 EP3202509 B1 EP 3202509B1 EP 17154981 A EP17154981 A EP 17154981A EP 3202509 B1 EP3202509 B1 EP 3202509B1
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- European Patent Office
- Prior art keywords
- segments
- path
- belt
- casting
- along
- Prior art date
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- 239000002184 metal Substances 0.000 title claims description 23
- 238000009749 continuous casting Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000005266 casting Methods 0.000 claims description 56
- 238000003825 pressing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 4
- 239000012809 cooling fluid Substances 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0685—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0608—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0654—Casting belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0677—Accessories therefor for guiding, supporting or tensioning the casting belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
Definitions
- the present invention relates to a machine for manufacturing continuous bars of nonferrous metal by continuous casting.
- the segments which form a chain, can move along a closed path that has at least one first substantially rectilinear portion at the casting and cooling region where they define a moving canal, being supported by suitable rails.
- a metallic belt covers the aforementioned canal, defining the fourth side of the closed and continuous shell along the rectilinear portion.
- the belt moves at the same speed as the casting bodies of the underlying chain, and is kept in position and under tension by three rollers.
- the first roller is arranged above the point where the casting nozzle or crucible introduces the molten metal;
- the second roller which is motorized, is arranged above the point where the solidified metal bar leaves the continuous shell;
- the third roller which is the tension roller (or pulley), has its axis compulsorily parallel to those of the first two and is in a higher position with respect to these.
- the spray nozzles can be regulated for areas both under pressure and under flow.
- the letter A designates the supporting structure of the machine
- the letter B designates the driving motor pinion
- the letter C designates the resisting pinion which causes the compression of the chain D of casting bodies E along the rectilinear portion of their path in which the molten metal is cast.
- F designates the metallic belt
- G and H designate the supporting rollers of the belt respectively at the point of pouring the molten metal and the point of disengagement of the casting bodies from the bar in the step of solidification
- I designates the tension roller or pulley.
- L designates the means of moving the rollers and the tension pulley I.
- the letter M designates the means, constituted by rollers or by sliders, for pressing the belt against the edges of the continuous casting shell with their movement device.
- N designates the cooling nozzles and O designates the crucible for pouring the metal.
- the dotted lines show the position of the belt and of the corresponding supporting and movement elements when it is being substituted.
- both the tension roller (pulley) and the other two rollers or supporting rollers be provided with a movement away from the continuous shell (canal) which, in conventional machines, is obtained by mounting the rollers on arms that rotate about pins that are machined on the supporting structure that constitutes the footing of the entire machine and which also supports the pinions: the hauling pinion and the resisting pinion of the chain of casting bodies.
- Such arms can be moved with hydraulic, pneumatic or electrical movement means.
- this type of casting machine which can reach 4 meters in height and a length that can vary from 3 to 6 meters and beyond, has considerable measurements and it is practically impossible, even by taking the greatest care, for all the reaming operations, performed on separate parts, of all the axes of all the rotating elements described above to be parallel to within tolerances that are exact enough to prevent distortion and fleeting of the belt and the ineffectiveness of the sliders or presser rollers, and consequent penetration of metal.
- JP S60 49840 discloses a mechanism to tension the belt.
- the aim of the present invention is to solve the above mentioned problems, by providing a machine for manufacturing continuous bars of nonferrous metal by continuous casting, of the Track and Belt type, that ensures greater precision in the arrangement and in the movement of the elements that support and actuate the belt, so as to effectively prevent penetrations of metal between the casting bodies and the belt.
- an object of the invention is to provide a machine that ensures an excellent seal between the belt and the casting bodies while allowing the movement of the belt in order to carry out necessary maintenance operations.
- Another object of the invention is to provide a machine that offers high reliability and which requires reduced maintenance operations.
- Another object of the invention is to provide a machine that can be provided and run at low cost for long periods of continuous operation.
- a machine for manufacturing continuous bars of nonferrous metal by continuous casting which comprises a movable casting shell composed of a plurality of segments arranged in succession, each one having a portion defined, with bottom and flanks, of said casting shell, and open on the sides directed toward the contiguous segments; said segments being movable along a closed path that has a rectilinear portion at the casting region; along said portion of path, said segments being aligned and defining a portion of the casting shell, with bottom and flanks, which is continuous, rectilinear and closed, for at least one portion of the path downstream of the casting region, by closure means at its side that lies opposite with respect to the bottom; downstream of said rectilinear portion, said path of the segments having a change of direction for the progressive disengagement of said casting shell from the metal bar produced by the solidification of the metal in the casting shell; said closure means comprising a belt which extends along a closed path and is supported by corresponding supporting means
- the casting shell 2 is composed of a plurality of concatenated segments 3, which are arranged in succession and which can move along a path that has at least one rectilinear portion 4 at the casting region 5.
- Figure 3 shows that, in each one of the segments 3, a portion is defined with a bottom 3a and flanks 3b, 3c of the casting shell 2, which is open on its sides directed toward the contiguous segments 3 as well as on its opposite side with respect to the bottom 3a.
- the segments 3 are substantially aligned and define a portion of the casting shell 2.
- Such portion of the casting shell 2 is movable, continuous, and rectilinear and it is closed, for a portion thereof downstream of the casting region 5, by closure means 6 at its side that is opposite with respect to the bottom 3a of the various segments 3 that make it up.
- the path of the segments 3 undergoes a change of direction that causes the progressive disengagement of the casting shell 2 from the bar 7 deriving from the solidification of the metal in the casting shell 2.
- the segments 3, at the portion 4 have their side, opposite with respect to the bottom 3a, directed upward.
- the portion 4 extends slightly inclined by at least 3° downward according to the direction of advancement 40 of the segments 3 along the corresponding path.
- the segments 3 are connected to the links 8 of a chain 9, closed, which is wound on at least two pinions 10a, 10b with horizontal and mutually parallel axes, which are supported by the fixed supporting structure 11 of the machine.
- the portion 4 of the path of the segments 3 is defined by the upper branch of the chain 9 which extends between the pinions 10a, 10b.
- the pinion 10a can be actuated with a rotary motion about its own axis, in a way that is known per se, in order to produce the advancement of the chain 9 and therefore of the segments 3 along the path defined by the chain 9, while the other pinion 10b is conveniently braked so that the segments 3, along the portion 4, are pressed up against each other.
- the links of the chain 9 are articulated to each other by way of pins 12 the axes of which are parallel to the axes of the pinions 10a, 10b which mesh with the central region of the pins 12.
- two idle wheels 13a, 13b are mounted as shown in Figure 3 and, at the portion 4, there are two tracks 14a, 14b, mutually parallel and delimited laterally by corresponding flanks 15a, 15b, on which the wheels 13a, 13b rest.
- the closure means 6 of the side of the casting shell 2 that is opposite with respect to the bottom 3a comprise a belt 16, preferably made of steel, which is slightly wider than the casting shell 2 defined by the segments 3 and can move along a path that faces the portion 4 with a rectilinear portion thereof.
- the belt 16 is supported by corresponding support means 17 and, on its rectilinear portion that faces the portion 4, pressing means 18 act which press it against the edges of the upper side of the casting shell 2 defined by the segments 3 along the portion 4.
- the support means 17 comprise at least two supporting rollers 19a, 19b which have axes that are horizontal, mutually parallel and oriented substantially at right angles to the portion 4 of the path of the segments 3. These supporting rollers 19a, 19b are mounted in a fixed position on a same beam 20 which extends substantially parallel to the portion 4 of the path of the segments 3.
- the pressing means 18 are also mounted on the beam 20.
- the supporting rollers 19a, 19b are supported, so that they can rotate about their axes, by the beam 20 which can move toward or away from the portion 4, as will be better described below.
- the belt 16 is a closed loop and is wound on supporting rollers 19a, 19b and on a tension roller 21.
- the belt 16, which advances at the same speed as the segments 3, can be moved by friction by contact with the segments 3 and/or by the actuation of at least one of the supporting rollers 19a, 19b.
- the tension roller 21 engages with an area of the belt 16 that is outside the portion of the belt 16 that faces the substantially rectilinear portion 4 of the casting shell 2.
- the tension roller 21 is supported, so that it can rotate about its own axis, which is parallel to the axes of the supporting rollers 19a, 19b, by an arm 22 which is pivoted, about a corresponding pivoting axis 22a parallel to the axis of the tension roller 21, to a branch 20a of the beam 20.
- the arm 22 can rotate with respect to the beam 20 about the pivoting axis 22a, for example by the action of a fluid-operated actuation cylinder 23, in order to increase or reduce the tension of the belt 16, as shown by the dotted lines in Figure 2 .
- the belt 16 extends along a closed path that has a substantially triangular shape structure, with the vertices defined by the two supporting rollers 19a, 19b and by the tension roller 21.
- the pressing means 18 comprise a plurality of rollers 24 or sliders which are mounted on the beam 20 and are elastically pressed, by way of corresponding springs 25, against the side of the belt 16 that is opposite with respect to the segments 3 along the portion of the belt 16 which faces the substantially rectilinear portion 4 of the path of the segments 3.
- the beam 20 is connected to the fixed supporting structure 11 of the machine by way of an articulated parallelogram 26 made up of a pair of mutually parallel linkages 27a, 27b which are pivoted, with one end thereof, to the fixed supporting structure 11 and, with the other end thereof, to a flank of the beam 20.
- the mutually parallel pivoting axes of the linkages 27a, 27b are substantially perpendicular to the axes of the supporting rollers 19a, 19b.
- cooling means comprise a plurality of nozzles 29 for dispensing a cooling fluid (generally water) which are facing both below and laterally to the segments 3 along the portion 4, so as to strike the lower side and the flanks thereof with the cooling liquid.
- a cooling fluid generally water
- the cooling means also comprise a plurality of nozzles 30 for dispensing a cooling fluid which are facing above the portion of the belt 16 that, in each instance, engages with the segments 3 along the portion 4, so as to strike the upper face of the belt 16 engaged with the segments 3 with the cooling fluid.
- the portion of the casting shell 2 defined in each one of the segments 3 preferably has, in a transverse cross-section with respect to the advancement direction of the segments 3 along the path imposed by the chain 9, an isosceles trapezoid shape structure, open at the longer base.
- the metal in the melted state is fed, by way of a crucible 31, proximate to the top of the portion of the path of the segments 3.
- Operation of the machine according to the invention is similar to that of the machine described in EP1317980 B1 .
- the metal which is poured from the crucible 31 into the portion of the casting shell 2 defined by the segments 3 along the portion 4, progressively solidifies forming a continuous bar 7 that gradually disengages from the casting shell 2 at the end of the portion 4 of the path of the segments 3 proximate to the pinion 10b.
- the bores of the beam 20 in order to provide the seats of the shafts for the supporting rollers 19a, 19b and for the arm 22 that carries the tension roller 21 can all be carried out with a single placing of the beam 20, which can be made of welded steel, on an adapted boring machine. This ensures a parallelism of the axes of the supporting rollers 19a, 19b and of the tension roller 21 within the smallest possible tolerances.
- the preferred arrangement of the belt-tensioning rollers 24 or sliders on the beam 20 makes it possible to obtain a high level of efficacy in pressing the various regions of the belt 16 against the movable casting shell 2 and therefore to achieve a high level of reliability in the seal between the belt 16 and the casting shell 2.
- the mounting and the removal of the belt 16 can be carried out in a simple manner by way of moving the beam 20 preferably by way of the articulated parallelogram 26 which ensures the maintenance of the parallelism of all the axes of the rotating elements of the machine.
- a machine according to the invention comprises a 16 with each production cycle.
- the machine according to the invention fully achieves the set aim, since it eliminates or substantially reduces the danger of distortion or fleeting of the belt, thus improving the efficacy of pressing the belt against the casting shell.
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- Rolls And Other Rotary Bodies (AREA)
Description
- The present invention relates to a machine for manufacturing continuous bars of nonferrous metal by continuous casting.
- As is known, the technology is now established for producing nonferrous ingots using a continuous casting machine fitted with a moveable and rectilinear casting shell composed of a plurality of concatenated casting segments or bodies with a U-shaped cross-section in succession, each one with bottom and flanks but open on the sides directed toward the contiguous segments.
- The segments, which form a chain, can move along a closed path that has at least one first substantially rectilinear portion at the casting and cooling region where they define a moving canal, being supported by suitable rails.
- Downstream of this rectilinear portion, the path of the chain of casting bodies continues around a braked pinion that brings the chain, now slack, downward until it reaches a second pinion, arranged on the same plane as the first and motorized and hauling, which brings it back upward and to the rectilinear portion.
- A metallic belt covers the aforementioned canal, defining the fourth side of the closed and continuous shell along the rectilinear portion. The belt moves at the same speed as the casting bodies of the underlying chain, and is kept in position and under tension by three rollers. The first roller is arranged above the point where the casting nozzle or crucible introduces the molten metal; the second roller, which is motorized, is arranged above the point where the solidified metal bar leaves the continuous shell; the third roller, which is the tension roller (or pulley), has its axis compulsorily parallel to those of the first two and is in a higher position with respect to these.
- Means of cooling by sprays of water or water/air strike the belt and the bottom of the casting bodies, or all four sides of the moveable shell, allowing the solidification of the metal. The spray nozzles can be regulated for areas both under pressure and under flow.
- One of these machines is disclosed in
EP1317980 B1 . Such patent shows the machine only schematically, solely in order to explain its principle of operation; in fact, in the graphic representation, the entire system for moving the rollers for transporting the belt, including the essential tension roller, is omitted. - A practical implementation of this machine, which on the world market is often called Track and Belt in order to distinguish it from other continuous shell machines such as the Properzi Wheel and Belt machine, or the Belts and Side Dams machine, also known as Hazelett, is shown in
Figure 1 of the present application. - In such figure, the letter A designates the supporting structure of the machine, the letter B designates the driving motor pinion and the letter C designates the resisting pinion which causes the compression of the chain D of casting bodies E along the rectilinear portion of their path in which the molten metal is cast. F designates the metallic belt, while G and H designate the supporting rollers of the belt respectively at the point of pouring the molten metal and the point of disengagement of the casting bodies from the bar in the step of solidification, and I designates the tension roller or pulley. L designates the means of moving the rollers and the tension pulley I. The letter M designates the means, constituted by rollers or by sliders, for pressing the belt against the edges of the continuous casting shell with their movement device. N designates the cooling nozzles and O designates the crucible for pouring the metal. The dotted lines show the position of the belt and of the corresponding supporting and movement elements when it is being substituted.
- In industrial use, this machine has displayed some problems.
- One of these problems, which derives from the offset of the various elements, is the difficulty of succeeding in obtaining a seal between the belt and the casting bodies that is such as to prevent infiltrations of liquid metal at the start of pouring, and misuse of the belt which shortens its useful life.
- In fact, in a machine of the type described above, tensioning the belt as much as possible in order to keep it as rectilinear as possible, and using generic presser means to ensure the contact between the belt and the underlying casting bodies for the whole rectilinear path, as indicated in
EP1317980 B1 , have produced results that are not entirely satisfactory. - In fact, even a very slight non-parallelism of the axes of the three rollers results in deformations and undulations in the belt; this is combined with uncertain positioning of the presser means and hence the malfunctioning thereof (short lifetime of the belt) and possibly also interruption of the casting.
- Furthermore, owing to maintenance requirements and changing the belt, which is worn down by the thermal cycles undergone in one or more work shifts, it is necessary that both the tension roller (pulley) and the other two rollers or supporting rollers be provided with a movement away from the continuous shell (canal) which, in conventional machines, is obtained by mounting the rollers on arms that rotate about pins that are machined on the supporting structure that constitutes the footing of the entire machine and which also supports the pinions: the hauling pinion and the resisting pinion of the chain of casting bodies. Such arms can be moved with hydraulic, pneumatic or electrical movement means.
- In this configuration according to the known art, it has been found that it is possible for liquid metal to penetrate between the casting bodies and the belt; this phenomenon is due to the fact that it is practically impossible, with such configuration described above, to ensure the necessary precision in the parallelism of the rollers that guide the belt and the pinions that move the casting shell and also the correct positioning of the presser means.
- In fact, in industrial implementations, this type of casting machine, which can reach 4 meters in height and a length that can vary from 3 to 6 meters and beyond, has considerable measurements and it is practically impossible, even by taking the greatest care, for all the reaming operations, performed on separate parts, of all the axes of all the rotating elements described above to be parallel to within tolerances that are exact enough to prevent distortion and fleeting of the belt and the ineffectiveness of the sliders or presser rollers, and consequent penetration of metal.
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JP S60 49840 - The aim of the present invention is to solve the above mentioned problems, by providing a machine for manufacturing continuous bars of nonferrous metal by continuous casting, of the Track and Belt type, that ensures greater precision in the arrangement and in the movement of the elements that support and actuate the belt, so as to effectively prevent penetrations of metal between the casting bodies and the belt.
- Within this aim, an object of the invention is to provide a machine that ensures an excellent seal between the belt and the casting bodies while allowing the movement of the belt in order to carry out necessary maintenance operations.
- Another object of the invention is to provide a machine that offers high reliability and which requires reduced maintenance operations.
- Another object of the invention is to provide a machine that can be provided and run at low cost for long periods of continuous operation.
- This aim and these and other objects which will become better apparent hereinafter are achieved by a machine for manufacturing continuous bars of nonferrous metal by continuous casting, which comprises a movable casting shell composed of a plurality of segments arranged in succession, each one having a portion defined, with bottom and flanks, of said casting shell, and open on the sides directed toward the contiguous segments; said segments being movable along a closed path that has a rectilinear portion at the casting region; along said portion of path, said segments being aligned and defining a portion of the casting shell, with bottom and flanks, which is continuous, rectilinear and closed, for at least one portion of the path downstream of the casting region, by closure means at its side that lies opposite with respect to the bottom; downstream of said rectilinear portion, said path of the segments having a change of direction for the progressive disengagement of said casting shell from the metal bar produced by the solidification of the metal in the casting shell; said closure means comprising a belt which extends along a closed path and is supported by corresponding supporting means, means being provided for pressing a rectilinear portion of said belt, which faces said rectilinear portion of the path of the segments, against the side of said segments that is opposite with respect to their bottom, characterized in that said means for supporting the belt comprise at least two supporting rollers and at least one tension roller, which have mutually parallel axes that are oriented at right angles to said substantially rectilinear portion of the path of the segments, said supporting rollers being mounted in a fixed position on a same beam which extends parallel to said rectilinear portion of the path of the segments.
- Further characteristics and advantages of the invention will become better apparent from the description of a preferred, but not exclusive, embodiment of the machine according to the invention, which is illustrated by way of non-limiting example in the accompanying drawings wherein:
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Figure 1 shows a continuous casting machine of the Track and Belt type, provided according to the prior art; -
Figure 2 schematically shows a machine according to the invention; -
Figure 3 is an enlarged schematic cross-section view ofFigure 2 , taken along the line III-III.moveable casting shell 2. - The
casting shell 2 is composed of a plurality of concatenatedsegments 3, which are arranged in succession and which can move along a path that has at least onerectilinear portion 4 at thecasting region 5. -
Figure 3 shows that, in each one of thesegments 3, a portion is defined with abottom 3a andflanks casting shell 2, which is open on its sides directed toward thecontiguous segments 3 as well as on its opposite side with respect to thebottom 3a. - Along the
portion 4, thesegments 3 are substantially aligned and define a portion of thecasting shell 2. Such portion of thecasting shell 2 is movable, continuous, and rectilinear and it is closed, for a portion thereof downstream of thecasting region 5, by closure means 6 at its side that is opposite with respect to thebottom 3a of thevarious segments 3 that make it up. - Downstream of the
portion 4, the path of thesegments 3 undergoes a change of direction that causes the progressive disengagement of thecasting shell 2 from thebar 7 deriving from the solidification of the metal in thecasting shell 2. - Conveniently, the
segments 3, at theportion 4, have their side, opposite with respect to thebottom 3a, directed upward. - The
portion 4 extends slightly inclined by at least 3° downward according to the direction ofadvancement 40 of thesegments 3 along the corresponding path. - In more detail, the
segments 3 are connected to thelinks 8 of achain 9, closed, which is wound on at least twopinions structure 11 of the machine. - The
portion 4 of the path of thesegments 3 is defined by the upper branch of thechain 9 which extends between thepinions pinion 10a can be actuated with a rotary motion about its own axis, in a way that is known per se, in order to produce the advancement of thechain 9 and therefore of thesegments 3 along the path defined by thechain 9, while theother pinion 10b is conveniently braked so that thesegments 3, along theportion 4, are pressed up against each other. - The links of the
chain 9 are articulated to each other by way ofpins 12 the axes of which are parallel to the axes of thepinions pins 12. - Conveniently, along the
portion 4 of the path of thesegments 3, there are means for supporting and guiding thechain 9 that carries thesegments 3. - More specifically, on the
pins 12, proximate to their axial ends, laterally to the links of thechain 9 and on mutually opposite sides, twoidle wheels Figure 3 and, at theportion 4, there are twotracks corresponding flanks wheels - The closure means 6 of the side of the
casting shell 2 that is opposite with respect to thebottom 3a comprise abelt 16, preferably made of steel, which is slightly wider than thecasting shell 2 defined by thesegments 3 and can move along a path that faces theportion 4 with a rectilinear portion thereof. - The
belt 16 is supported by corresponding support means 17 and, on its rectilinear portion that faces theportion 4, pressingmeans 18 act which press it against the edges of the upper side of thecasting shell 2 defined by thesegments 3 along theportion 4. - According to the invention, the support means 17 comprise at least two supporting
rollers portion 4 of the path of thesegments 3. These supportingrollers same beam 20 which extends substantially parallel to theportion 4 of the path of thesegments 3. - Conveniently, the pressing
means 18 are also mounted on thebeam 20. - More specifically, the supporting
rollers pinions beam 20 which can move toward or away from theportion 4, as will be better described below. - The
belt 16 is a closed loop and is wound on supportingrollers tension roller 21. - The
belt 16, which advances at the same speed as thesegments 3, can be moved by friction by contact with thesegments 3 and/or by the actuation of at least one of the supportingrollers - The
tension roller 21 engages with an area of thebelt 16 that is outside the portion of thebelt 16 that faces the substantiallyrectilinear portion 4 of thecasting shell 2. - The
tension roller 21 is supported, so that it can rotate about its own axis, which is parallel to the axes of the supportingrollers arm 22 which is pivoted, about acorresponding pivoting axis 22a parallel to the axis of thetension roller 21, to abranch 20a of thebeam 20. Thearm 22 can rotate with respect to thebeam 20 about thepivoting axis 22a, for example by the action of a fluid-operatedactuation cylinder 23, in order to increase or reduce the tension of thebelt 16, as shown by the dotted lines inFigure 2 . - In practice, the
belt 16 extends along a closed path that has a substantially triangular shape structure, with the vertices defined by the two supportingrollers tension roller 21. - The
pressing means 18 comprise a plurality ofrollers 24 or sliders which are mounted on thebeam 20 and are elastically pressed, by way ofcorresponding springs 25, against the side of thebelt 16 that is opposite with respect to thesegments 3 along the portion of thebelt 16 which faces the substantiallyrectilinear portion 4 of the path of thesegments 3. - Conveniently, the
beam 20 is connected to the fixed supportingstructure 11 of the machine by way of an articulatedparallelogram 26 made up of a pair of mutuallyparallel linkages structure 11 and, with the other end thereof, to a flank of thebeam 20. The mutually parallel pivoting axes of thelinkages rollers - The rotation of the pair of
linkages beam 20 parallel thereto, in the embodiment shown is obtained by way of a fluid-operatedactuation cylinder 28, but it can be obtained by way of another actuator of known type. - Advantageously, there are means of cooling the metal poured into the casting
shell 2, and also of the elements of the machine that come into contact with the poured metal. Such cooling means comprise a plurality ofnozzles 29 for dispensing a cooling fluid (generally water) which are facing both below and laterally to thesegments 3 along theportion 4, so as to strike the lower side and the flanks thereof with the cooling liquid. - The cooling means also comprise a plurality of
nozzles 30 for dispensing a cooling fluid which are facing above the portion of thebelt 16 that, in each instance, engages with thesegments 3 along theportion 4, so as to strike the upper face of thebelt 16 engaged with thesegments 3 with the cooling fluid. - The portion of the casting
shell 2 defined in each one of thesegments 3 preferably has, in a transverse cross-section with respect to the advancement direction of thesegments 3 along the path imposed by thechain 9, an isosceles trapezoid shape structure, open at the longer base. - The metal in the melted state is fed, by way of a
crucible 31, proximate to the top of the portion of the path of thesegments 3. - Operation of the machine according to the invention is similar to that of the machine described in
EP1317980 B1 . The metal, which is poured from thecrucible 31 into the portion of the castingshell 2 defined by thesegments 3 along theportion 4, progressively solidifies forming acontinuous bar 7 that gradually disengages from the castingshell 2 at the end of theportion 4 of the path of thesegments 3 proximate to thepinion 10b. - It is important to note that, in the machine according to the invention, the bores of the
beam 20 in order to provide the seats of the shafts for the supportingrollers arm 22 that carries thetension roller 21 can all be carried out with a single placing of thebeam 20, which can be made of welded steel, on an adapted boring machine. This ensures a parallelism of the axes of the supportingrollers tension roller 21 within the smallest possible tolerances. By virtue of this fact, it is possible to obtain a high degree of precision in the parallelism between the axes of therollers pinions casting shell 2, thus appreciably reducing the danger of infiltration of liquid metal between thebelt 16 and the castingshell 2. - The preferred arrangement of the belt-
tensioning rollers 24 or sliders on thebeam 20 makes it possible to obtain a high level of efficacy in pressing the various regions of thebelt 16 against themovable casting shell 2 and therefore to achieve a high level of reliability in the seal between thebelt 16 and the castingshell 2. - In the machine according to the invention, the mounting and the removal of the
belt 16 can be carried out in a simple manner by way of moving thebeam 20 preferably by way of the articulatedparallelogram 26 which ensures the maintenance of the parallelism of all the axes of the rotating elements of the machine. - The high precision achievable in providing the seats for the shafts of the supporting
rollers tensioning rollers 24 or sliders are mounted on thesame beam 20 in which these seats are provided, make it possible to exactly reposition these elements and the belt - With reference to
Figures 2 and3 , a machine according to the invention, generally designated by thereference numeral 1, comprises a 16 with each production cycle. - In practice it has been found that the machine according to the invention fully achieves the set aim, since it eliminates or substantially reduces the danger of distortion or fleeting of the belt, thus improving the efficacy of pressing the belt against the casting shell.
- The machine, thus conceived, is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. Moreover, all the details may be substituted by other, technically equivalent elements.
- In practice the materials employed, provided they are compatible with the specific use, and the dimensions, may be any according to requirements and to the state of the art.
Claims (10)
- A machine for manufacturing continuous bars of nonferrous metal by continuous casting, which comprises a movable casting shell (2) composed of a plurality of segments (3) arranged in succession, each one having a portion defined, with a bottom (3a) and flanks (3b, 3c), of said casting shell (2), and open on sides directed toward the plurality of segments (3); said segments (3) being movable along a closed path that has a rectilinear portion (4) at a casting region (5); along said portion (4) of path, said segments (3) being aligned and defining a portion of the casting shell (2), with bottom and flanks, which is continuous, rectilinear and closed, for at least one portion of a path downstream of the casting region (5), by closure means (6) at its side that lies opposite with respect to the bottom; downstream of said rectilinear portion (4), said path of the segments (3) having a change of direction for a progressive disengagement of said casting shell (2) from a metal bar (7) produced by solidification of the metal in the casting shell (2); said closure means (6) comprising a belt (16) which extends along a closed path and is supported by corresponding supporting means (17), which comprise at least two supporting rollers (19a, 19b), means (18) being provided for pressing a rectilinear portion of said belt (16), which faces said rectilinear portion (4) of the path of the segments (3), against a side of said segments (3) that is opposite with respect to their bottom (3a), characterized in that said means (17) for supporting the belt (16) comprise at least one tension roller (21), said at least two supporting rollers (19a, 19b9 and said at least one tension roller (21) having mutually parallel axes that are oriented at right angles to said rectilinear portion (4) of the path of the segments (3), said supporting rollers (19a, 19b) being mounted in a fixed position on a same beam (20) which extends parallel to said rectilinear portion (4) of the path of the segments (3).
- The machine according to claim 1, characterized in that said pressing means (18) are mounted on said beam (20).
- The machine according to claim 1, characterized in that said tension roller (21) engages said belt (16) externally to said portion of the belt (16) that faces said rectilinear portion (4) of the path of the segments (3), said tension roller (21) being supported by an arm (22) which is pivoted to a branch (20a) of said beam (20) about a pivoting axis (22a) which is parallel to the axis of said tension roller (21), said arm (22) being rotatable on command about said pivoting axis (22a) in order to increase or reduce the tension of said belt (16) along its path.
- The machine according to one or more of the preceding claims, characterized in that said belt (16) extends along a path that has a triangular shape with the vertices defined by said two supporting rollers (19a, 19b) and by said tension roller (21).
- The machine according to one or more of the preceding claims, characterized in that said pressing means (18) of said belt (16) comprise a plurality of rollers (24) or sliders that are mounted on said beam (20) and are pressed elastically against the side of said belt (16) that is opposite with respect to said segments (3) along the portion of said belt (16) that faces said rectilinear portion (4) of the path of the segments (3).
- The machine according to one or more of the preceding claims, characterized in that said beam (20) can move on command toward or away from said rectilinear portion (4) of the path of the segments (3).
- The machine according to one or more of the preceding claims, characterized in that said beam (20) is connected to a fixed supporting structure (11) by way of an articulated parallelogram (26).
- The machine according to one or more of the preceding claims, characterized in that, along said rectilinear portion (4) of the path of the segments (3), said casting shell (2) has its opposite side with respect to the bottom directed upward.
- The machine according to one or more of the preceding claims, characterized in that said rectilinear portion (4) of the path of the segments (3) extends at an angle of at least 3° downward along the advancement direction (40) of said segments (3) along the corresponding path; a point of introduction of the molten metal into said casting shell (2) being arranged proximate to a top of said rectilinear portion (4) of the path of the segments (3), said belt (16) facing with its rectilinear portion subtended between said two supporting rollers (19a, 19b) above said rectilinear portion (4) of the path of the segments (3).
- The machine according to one or more of the preceding claims, characterized in that it comprises means (29, 30) for cooling said segments (3) and said belt (16) along said rectilinear portions of the corresponding mutually facing paths.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUB2016A000568A ITUB20160568A1 (en) | 2016-02-08 | 2016-02-08 | MACHINE FOR PRODUCTION, USING CONTINUOUS CASTING, OF NON-FERROUS METAL BARS. |
Publications (2)
Publication Number | Publication Date |
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EP3202509A1 EP3202509A1 (en) | 2017-08-09 |
EP3202509B1 true EP3202509B1 (en) | 2018-09-26 |
Family
ID=55969256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17154981.9A Active EP3202509B1 (en) | 2016-02-08 | 2017-02-07 | Machine for manufacturing continuous bars of nonferrous metal by continuous casting |
Country Status (6)
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US (1) | US10350675B2 (en) |
EP (1) | EP3202509B1 (en) |
CN (1) | CN107042292B (en) |
ES (1) | ES2702784T3 (en) |
IT (1) | ITUB20160568A1 (en) |
RU (1) | RU2718020C2 (en) |
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KR20200041948A (en) * | 2017-08-16 | 2020-04-22 | 노벨리스 인크. | Belt casting path control |
IT201800006009A1 (en) * | 2018-06-04 | 2019-12-04 | CONTINUOUS CASTING SYSTEM OF PRODUCTS | |
CN110076308A (en) * | 2019-05-30 | 2019-08-02 | 燕山大学 | A kind of amorphous alloy conticaster and its continuous casing |
IT202000000457A1 (en) * | 2020-01-13 | 2021-07-13 | G M S Global Metallurgical Solutions S R L | DEVICE AND PROCEDURE FOR PRODUCING METAL BARS BY CONTINUOUS CASTING |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6049840A (en) * | 1983-08-29 | 1985-03-19 | Sumitomo Metal Ind Ltd | Twin belt type continuous casting plant |
RU2100136C1 (en) * | 1995-12-19 | 1997-12-27 | Сидельников Сергей Борисович | Plant for continuous casting and extrusion of metal |
RU2094168C1 (en) * | 1996-04-17 | 1997-10-27 | Общество с ограниченной ответственностью "Модуль-Инжиниринг-Патент" | Method of manufacturing steel bar |
ITMI20012556A1 (en) * | 2001-12-04 | 2003-06-04 | Giulio Properzi | PLANT FOR THE PRODUCTION, BY CONTINUOUS CASTING, OF NON-FERROUS METAL INGOTS |
NO320254B1 (en) * | 2003-06-30 | 2005-11-14 | Norsk Hydro As | Method and equipment for continuous or semi-continuous stopping of metal |
CN2740318Y (en) * | 2004-11-25 | 2005-11-16 | 李铁铎 | Movable synchronous circulating crystallizer of steel band |
-
2016
- 2016-02-08 IT ITUB2016A000568A patent/ITUB20160568A1/en unknown
- 2016-12-14 RU RU2016149145A patent/RU2718020C2/en active
-
2017
- 2017-01-06 CN CN201710011324.9A patent/CN107042292B/en active Active
- 2017-02-07 EP EP17154981.9A patent/EP3202509B1/en active Active
- 2017-02-07 ES ES17154981T patent/ES2702784T3/en active Active
- 2017-02-08 US US15/427,321 patent/US10350675B2/en active Active
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Also Published As
Publication number | Publication date |
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RU2016149145A (en) | 2018-06-19 |
RU2718020C2 (en) | 2020-03-30 |
EP3202509A1 (en) | 2017-08-09 |
CN107042292A (en) | 2017-08-15 |
ITUB20160568A1 (en) | 2017-08-08 |
ES2702784T3 (en) | 2019-03-05 |
RU2016149145A3 (en) | 2020-01-24 |
US20170225224A1 (en) | 2017-08-10 |
US10350675B2 (en) | 2019-07-16 |
CN107042292B (en) | 2020-07-28 |
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